Exterior surface of a container sidewall



FIG. 1 is a top, front, right side perspective view of a exterior surface of a container sidewall showing the new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a left side elevational view thereof.

The undisclosed rear forms a mirror image of the front seen in FIG. 3. The neck shown at the top in broken lines is for illustrative purposes only and forms no part of the claimed invention. 

The ornamental design for an exterior surface of a container sidewall, as shown and described. 